Improvement in guides for matching-machines



P. CARDIFF.

' Guide for Matching-Machines.

No Patented Jan; 28, 18 79.

Fly.

iimlllllumm WITNESSES ATTORNEYS.

UNITED STATES PATENT OFFICE.

PATRICK CARDIFF, OF MARSHFIELD, OREGON, ASSIGNOR TO HIMSELF AND JONATHANM. ADAMS, OF SAME PLACE.

IMPROVEMENT IN GUIDES FOR MATCHING-MACHINES.

Specification forming part of Letters Patent No. 211,699, dated January28,1879; application filed November 7, 1878.

To all whom it may concern:

Be it known that I, PATRICK OARDmF, of Marshfield, in the county of Coosand State of Oregon, have invented a new and useful Improvement inGuides for Matching-Machines, of which the following is a specification:

The object of this invention is to prevent the planer-knives fromsplitting the edges of the boards or breaking them when coming incontact with knots.

It consists in providing the guide with an eccentric groove, throughwhich the grooving-knife passes, the projecting sides of the groovebeing approached near to the edgingknives, the said groove being capableof enlargement to adapt it to receive knives of various sizes.

In the accompanying drawings, forming part of this specification, Figurel is a plan of a matcher-head with my improved guide attached to thebed-plate of the machine.

v bed-plate of the machine, and B is one of the matcher-heads, carryingthe grooving-knives a a.

The guide is designated by the letter U. It is composed of two parts, I)b, the ends of which adjacent to the matcher-heads being cut intosegments of circles eccentric to the axis of the head B. The end of partb is likewise rabbeted, as shown at 0, so that when the two parts areplaced together a groove is formed in the end of the guide next thehead, said groove being eccentric to the axis of the head, as indicatedby the dotted lines (I in Fig. 1.

Dowel-pins e e are inserted in the part b of the guide, and in the partb are corresponding holes. A slot, f, is also made in part b, and asimilar one, f, in part b.

D represents a shim, provided with a slot and holes corresponding tothose in the pieces I) b, which is placed between the said pieces,

to increase the width of the groove to suit the width of the knives inthe head.

The guide is secured to the plate A by a bolt, E, fixed in the plate andpassed through the slots in the pieces I) b, a nut, g, being screwed onthe bolt when the pieces are placed in position, securing them betweenit and the bed-plate, as clearly indicated in Fig. 2. By means of thisnut and bolt the distance of the guide from the matcher-head can beadjusted so as to accommodate it to longer and shorter knives. v

The operation of my invention is as fol lows: The guide is adjusted sothat the ends will be within about a thirty-second of an inch of theedging-knives, the grooving-knife entering the groove in the guide. In.this way, when a board is passed through the matcher, the edge will beguided and supported to within so short a distance of the edging-knivesthat there will be no liability of the sides of the groove splittingoff, as is so commonly the case where the old form of guide is used.That could not be adjusted beyond the space occupied by thegroovingknife. Consequently between that point and the edging-knife itwas unsustained, the result being that, when running across the grain orover knots, the knives split the edges and broke them to a great extent.

To increase the width of the groove it is only necessary to insertbetween the pieces b b one or more shims, according to the widthdesired.

Owing to the eccentricity of the groove in the guide to the axis of thematcher-head, considerable space is allowed between the bottom thereofand the circle described by the knives. Consequently there is no dangerof the groove becoming choked.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. As an improvement in guides for matchin g-machines,the guide 0, composed of parts I) b, which, when placed together andsecured by bolt E to bed-plate A, form a groove adjacent to thematcher-hcad, to receive the grooving-knives a a in their movement,substantially as described.

2. As an improvement in guides for matchno liability of the edges beingsplit or broken ing-machines, the guide 0, provided with a by theknives, substantially as described. groove in the end adjacent to thematcherhead, that enables it to be moved up to the PATRICK CARDIFFedging-knives, so as to just clear the same Witnesses:

when the machine is in operation, whereby sup- J. S. MAGNAMARA, I

portis afforded to the board, so that there is F. S. WEBBER.

